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<!--code，pre，var kbd samp 一定要避开HTML尖括号 -->
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  <p>For example, <code>&lt;section&gt;</code> should be wrapped as inline.</p>
  <pre><code>&lt;p&gt;Sample text here...&lt;/p&gt;
&lt;p&gt;And another line of sample text here...&lt;/p&gt;
</code></pre>
  <var>y</var> = <var>m</var><var>x</var> + <var>b</var>
  <p>To switch directories, type <kbd>cd</kbd> followed by the name of the directory.<br>
    To edit settings, press <kbd><kbd>ctrl</kbd> + <kbd>,</kbd></kbd></p>
  <p>s meant to <samp>This text is meant to be treated as sample output from a computer program.</samp>s meant to </p>
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